/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (c) 2016-2018  Arkadiusz Bokowy
 *  Copyright (C) 2006-2010  Nokia Corporation
 *  Copyright (C) 2004-2010  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef BLUEALSA_A2DPCODECS_H_
#define BLUEALSA_A2DPCODECS_H_

#include <stdint.h>

#define A2DP_CODEC_SBC      0x00
#define A2DP_CODEC_MPEG12   0x01
#define A2DP_CODEC_MPEG24   0x02
#define A2DP_CODEC_ATRAC    0x03
#define A2DP_CODEC_VENDOR   0xFF

/* customized 16-bit vendor extension */
#define A2DP_CODEC_VENDOR_APTX          0x4FFF
#define A2DP_CODEC_VENDOR_APTX_HD       0xD7FF
#define A2DP_CODEC_VENDOR_LDAC          0x2DFF

#define SBC_SAMPLING_FREQ_16000         (1 << 3)
#define SBC_SAMPLING_FREQ_32000         (1 << 2)
#define SBC_SAMPLING_FREQ_44100         (1 << 1)
#define SBC_SAMPLING_FREQ_48000         (1 << 0)

#define SBC_CHANNEL_MODE_MONO           (1 << 3)
#define SBC_CHANNEL_MODE_DUAL_CHANNEL   (1 << 2)
#define SBC_CHANNEL_MODE_STEREO         (1 << 1)
#define SBC_CHANNEL_MODE_JOINT_STEREO   (1 << 0)

#define SBC_BLOCK_LENGTH_4              (1 << 3)
#define SBC_BLOCK_LENGTH_8              (1 << 2)
#define SBC_BLOCK_LENGTH_12             (1 << 1)
#define SBC_BLOCK_LENGTH_16             (1 << 0)

#define SBC_SUBBANDS_4                  (1 << 1)
#define SBC_SUBBANDS_8                  (1 << 0)

#define SBC_ALLOCATION_SNR              (1 << 1)
#define SBC_ALLOCATION_LOUDNESS         (1 << 0)

#define SBC_MAX_BITPOOL                 64
#define SBC_MIN_BITPOOL                 2

#define MPEG_CHANNEL_MODE_MONO          (1 << 3)
#define MPEG_CHANNEL_MODE_DUAL_CHANNEL  (1 << 2)
#define MPEG_CHANNEL_MODE_STEREO        (1 << 1)
#define MPEG_CHANNEL_MODE_JOINT_STEREO  (1 << 0)

#define MPEG_LAYER_MP1                  (1 << 2)
#define MPEG_LAYER_MP2                  (1 << 1)
#define MPEG_LAYER_MP3                  (1 << 0)

#define MPEG_SAMPLING_FREQ_16000        (1 << 5)
#define MPEG_SAMPLING_FREQ_22050        (1 << 4)
#define MPEG_SAMPLING_FREQ_24000        (1 << 3)
#define MPEG_SAMPLING_FREQ_32000        (1 << 2)
#define MPEG_SAMPLING_FREQ_44100        (1 << 1)
#define MPEG_SAMPLING_FREQ_48000        (1 << 0)

#define MPEG_BIT_RATE_VBR               0x8000
#define MPEG_BIT_RATE_320000            0x4000
#define MPEG_BIT_RATE_256000            0x2000
#define MPEG_BIT_RATE_224000            0x1000
#define MPEG_BIT_RATE_192000            0x0800
#define MPEG_BIT_RATE_160000            0x0400
#define MPEG_BIT_RATE_128000            0x0200
#define MPEG_BIT_RATE_112000            0x0100
#define MPEG_BIT_RATE_96000             0x0080
#define MPEG_BIT_RATE_80000             0x0040
#define MPEG_BIT_RATE_64000             0x0020
#define MPEG_BIT_RATE_56000             0x0010
#define MPEG_BIT_RATE_48000             0x0008
#define MPEG_BIT_RATE_40000             0x0004
#define MPEG_BIT_RATE_32000             0x0002
#define MPEG_BIT_RATE_FREE              0x0001

#define AAC_OBJECT_TYPE_MPEG2_AAC_LC    0x80
#define AAC_OBJECT_TYPE_MPEG4_AAC_LC    0x40
#define AAC_OBJECT_TYPE_MPEG4_AAC_LTP   0x20
#define AAC_OBJECT_TYPE_MPEG4_AAC_SCA   0x10

#define AAC_SAMPLING_FREQ_8000          0x0800
#define AAC_SAMPLING_FREQ_11025         0x0400
#define AAC_SAMPLING_FREQ_12000         0x0200
#define AAC_SAMPLING_FREQ_16000         0x0100
#define AAC_SAMPLING_FREQ_22050         0x0080
#define AAC_SAMPLING_FREQ_24000         0x0040
#define AAC_SAMPLING_FREQ_32000         0x0020
#define AAC_SAMPLING_FREQ_44100         0x0010
#define AAC_SAMPLING_FREQ_48000         0x0008
#define AAC_SAMPLING_FREQ_64000         0x0004
#define AAC_SAMPLING_FREQ_88200         0x0002
#define AAC_SAMPLING_FREQ_96000         0x0001

#define AAC_CHANNELS_1                  0x02
#define AAC_CHANNELS_2                  0x01

#define AAC_GET_BITRATE(a) ((a).bitrate1 << 16 | \
					(a).bitrate2 << 8 | (a).bitrate3)
#define AAC_GET_FREQUENCY(a) ((a).frequency1 << 4 | (a).frequency2)

#define AAC_SET_BITRATE(a, b) \
	do { \
		(a).bitrate1 = ((b) >> 16) & 0x7f; \
		(a).bitrate2 = ((b) >> 8) & 0xff; \
		(a).bitrate3 = (b) & 0xff; \
	} while (0)
#define AAC_SET_FREQUENCY(a, f) \
	do { \
		(a).frequency1 = ((f) >> 4) & 0xff; \
		(a).frequency2 = (f) & 0x0f; \
	} while (0)

#define AAC_INIT_BITRATE(b) \
	.bitrate1 = ((b) >> 16) & 0x7f, \
	.bitrate2 = ((b) >> 8) & 0xff, \
	.bitrate3 = (b) & 0xff,
#define AAC_INIT_FREQUENCY(f) \
	.frequency1 = ((f) >> 4) & 0xff, \
	.frequency2 = (f) & 0x0f,

#define APTX_VENDOR_ID                  0x0000004f
#define APTX_CODEC_ID                   0x0001

#define APTX_CHANNEL_MODE_STEREO        0x02
#define APTX_CHANNEL_MODE_MONO          0x01

#define APTX_SAMPLING_FREQ_16000        0x08
#define APTX_SAMPLING_FREQ_32000        0x04
#define APTX_SAMPLING_FREQ_44100        0x02
#define APTX_SAMPLING_FREQ_48000        0x01

#define APTX_HD_VENDOR_ID               0x000000d7
#define APTX_HD_CODEC_ID                0x0024

#define APTX_HD_CHANNEL_MODE_STEREO     0x02
#define APTX_HD_CHANNEL_MODE_MONO       0x01

#define APTX_HD_SAMPLING_FREQ_16000     0x08
#define APTX_HD_SAMPLING_FREQ_32000     0x04
#define APTX_HD_SAMPLING_FREQ_44100     0x02
#define APTX_HD_SAMPLING_FREQ_48000     0x01

#define LDAC_VENDOR_ID                  0x0000012d
#define LDAC_CODEC_ID                   0x00aa

#define LDAC_CHANNEL_MODE_MONO          0x04
#define LDAC_CHANNEL_MODE_DUAL_CHANNEL  0x02
#define LDAC_CHANNEL_MODE_STEREO        0x01

#define LDAC_SAMPLING_FREQ_44100        0x20
#define LDAC_SAMPLING_FREQ_48000        0x10
#define LDAC_SAMPLING_FREQ_88200        0x08
#define LDAC_SAMPLING_FREQ_96000        0x04
#define LDAC_SAMPLING_FREQ_176400       0x02
#define LDAC_SAMPLING_FREQ_192000       0x01

typedef struct {
	uint32_t vendor_id;
	uint16_t codec_id;
} __attribute__ ((packed)) a2dp_vendor_codec_t;

#if __BYTE_ORDER == __LITTLE_ENDIAN

typedef struct {
	uint8_t channel_mode:4;
	uint8_t frequency:4;
	uint8_t allocation_method:2;
	uint8_t subbands:2;
	uint8_t block_length:4;
	uint8_t min_bitpool;
	uint8_t max_bitpool;
} __attribute__ ((packed)) a2dp_sbc_t;

typedef struct {
	uint8_t channel_mode:4;
	uint8_t crc:1;
	uint8_t layer:3;
	uint8_t frequency:6;
	uint8_t mpf:1;
	uint8_t rfa:1;
	uint16_t bitrate;
} __attribute__ ((packed)) a2dp_mpeg_t;

typedef struct {
	uint8_t object_type;
	uint8_t frequency1;
	uint8_t rfa:2;
	uint8_t channels:2;
	uint8_t frequency2:4;
	uint8_t bitrate1:7;
	uint8_t vbr:1;
	uint8_t bitrate2;
	uint8_t bitrate3;
} __attribute__ ((packed)) a2dp_aac_t;

typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t channel_mode:4;
	uint8_t frequency:4;
} __attribute__ ((packed)) a2dp_aptx_t;

typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t channel_mode:4;
	uint8_t frequency:4;
	uint32_t rfa;
} __attribute__ ((packed)) a2dp_aptx_hd_t;

typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t frequency:6;
	uint8_t rfa1:2;
	uint8_t channel_mode:3;
	uint8_t rfa2:5;
} __attribute__ ((packed)) a2dp_ldac_t;

#elif __BYTE_ORDER == __BIG_ENDIAN

typedef struct {
	uint8_t frequency:4;
	uint8_t channel_mode:4;
	uint8_t block_length:4;
	uint8_t subbands:2;
	uint8_t allocation_method:2;
	uint8_t min_bitpool;
	uint8_t max_bitpool;
} __attribute__ ((packed)) a2dp_sbc_t;

typedef struct {
	uint8_t layer:3;
	uint8_t crc:1;
	uint8_t channel_mode:4;
	uint8_t rfa:1;
	uint8_t mpf:1;
	uint8_t frequency:6;
	uint16_t bitrate;
} __attribute__ ((packed)) a2dp_mpeg_t;

typedef struct {
	uint8_t object_type;
	uint8_t frequency1;
	uint8_t frequency2:4;
	uint8_t channels:2;
	uint8_t rfa:2;
	uint8_t vbr:1;
	uint8_t bitrate1:7;
	uint8_t bitrate2;
	uint8_t bitrate3;
} __attribute__ ((packed)) a2dp_aac_t;

typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t frequency:4;
	uint8_t channel_mode:4;
} __attribute__ ((packed)) a2dp_aptx_t;

typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t frequency:4;
	uint8_t channel_mode:4;
	uint32_t rfa;
} __attribute__ ((packed)) a2dp_aptx_hd_t;

typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t rfa1:2;
	uint8_t frequency:6;
	uint8_t rfa2:5;
	uint8_t channel_mode:3;
} __attribute__ ((packed)) a2dp_ldac_t;

#else
# error "Unknown byte order"
#endif

#endif
